#15853: Unregisterised GHC panics when building test cgrun018 -------------------------------------+------------------------------------- Reporter: iliastsi | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.4.3 (CodeGen) | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | crash or panic Test Case: cgrun018 | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- An unregisterised ghc-8.4 on amd64 panics when building test cgrun018. {{{ Compile failed (exit code 1) errors were: [1 of 1] Compiling Main ( cgrun018.hs, cgrun018.o ) ghc-stage2: panic! (the 'impossible' happened) (GHC version 8.4.4 for x86_64-unknown-linux): pprStatics: float F32 F32 F32 F32 F32 F32 F32 F32 F32 F32 F32 Call stack: CallStack (from HasCallStack): callStackDoc, called at compiler/utils/Outputable.hs:1150:37 in ghc:Outputable pprPanic, called at compiler/cmm/PprC.hs:525:5 in ghc:PprC }}} We have seen this error while building packages for Debian on 64-bit architectures where GHC is unregisterised (e.g., mips64el, s390x): [https://buildd.debian.org/status/fetch.php?pkg=haskell- gloss&arch=mips64el&ver=1.13.0.1-1&stamp=1540810998&raw=0 gloss on mips64el], [https://buildd.debian.org/status/fetch.php?pkg=haskell- juicypixels&arch=s390x&ver=3.2.9.5-3&stamp=1540808360&raw=0 juicypixels on s390x] -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15853 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler